Road machine



c. A. GusTAFsoN 2,189,344

ROAD MACHINE Filed Dec. v, 1952 17 sheets-sheet 1 Feb. 6,` 1940.

Feb. 6, 1940. A c. A. GusTAFsoN 2,189,344

ROAD MACHINE Filed Deo. 7, 19:52 17 sheets-sheet 2` zo? s4 l INVENTOR. CARL AusTAFso/v Feb. 6, 1940..v4 y c. A. GusTAFsoN ROAD MACHINE Filed Dec. 7, 1932 1'7 Sheets-Sheet 3 CARL A. GUsTAFaoN A ToRNEf I Feb. '6, 1940. c. A. vcausTAFsoN ROAD MACHINE Filed Dec. 7, 1932 17 Sheets-Sheet ,4

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Filed DSC. '7, 1952 1'7 Sh eats-Sheet 6 CARL. A. GusTAFsQN BY f A TORNI/` Feb. 6, 1940.

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ROAD MACHINE Filed Dec. 7, 19:52 v v 1'7 sheets-sheet 14?A :En: E EE.. 653

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CAM. A. GusrAr-sou BY mma?- n Feb 6 1940' l c. A. GusTAFsoN 2,189,344

ROAD MACHINE Filed Deo. 7, 1932 17 she'ets-sheet 15 EIE E.1

IN VEN TOR.

CARL. A. GusrAF-.soN

Feb. 6, 1940. c. A. Gus'rAFsoN RoANMAcHINE Filed Dec. 7, 1932 17 sheets-sheet 1e INVENTOR.

CARI. A. GuaTAPsoN TTORH- e Feb. 6, 1940.

C; A. GUSTAFSQN ROAD MACHINE Filled bec. '7, 1952 1'? Sheets-Sheet 11 ,Bu non. .QON WON `0ON `QOM 5km. n.901.. l ouv.. o I www oom. M 5------ a-- l .um 5 y .u mN\ .Mv Ev 8N; W .lnmwn l#0*0 o r,.. kvm. we* .f L no Q no* "IINKP/ .o .vm o .Wn nov x mk. nsw no* nu* 6v.. um non van UNITED STATES PATENT OFFICE ROAD MACHINE Carl A. Gustafson, Peoria, Ill.,'aasignor to Caterpillar Tractor Co., San Leandro, Calif., a corporation of California y Application December 7, 1932, Serial No. 646,048

17 Claims.

The present invention relates to road machines and more particularlyto road graders. In the usual type of graders having an earth-engaging,

tool adapted to be positioned to make a high- Another object of the invention is to provide an improved mechanism for locking an .earthengaging tool in its angularly adjusted position with respect to the line of draft.

Another object of the'invention is to provide` means for preventing vertical and horizontal play in the tool supporting means of a road machine.

Another object of the invention is to provide Fig. 15 is a section taken on the line-I5-I5 in Fig. 14.

Figs. 16-22 illustrate the blade and circle assembly.

, angle cut, manually operable adjusting mechaa road machine having tiltable wheels and means 5 nisms are used, which require the provision of 4for limiting tilting movement thereof. compensating mechanism of some description to Another object of the invention is to provide enable the operator to position the heavy blade an improved draft connection. assembly in high-angle cutting position. The Another object of the invention is to provide 1o provision or such compensating mechanism not a power-operated control mechanism having a 10 only entails a complicated lifting mechanism, but control element adapted to determine operation also actually decreases the range of operation of of either oi two adjusting mechanisms. such mechanism so that the maximum high- Other objects will appear as the description angle cutting position of the blade is unduly progresses. limited. Description of figures 15 The provision of power-operated control mechanism as disclosed herein does away with the Figs. 1 and 2 are general views of the machine. necessity of employing any compensating means. Fig.- 1is a side elevation of the machine. thereby increasing the range of operation of the Fig. 2 is a plan view of the machine.

. f lifting mechanism and PrOVidinE a greater maxi.- Fig. 3 is a side elevation of the rear end of 2o m11m\ high-811816 Cutting POSitOD 0f the W01- 'the machine with certain parts broken away, Moreover no effort is required from the operator taken on une 3 3 m F1g \2 m making adjustments S0 that he remains reste@ Figs. 4-9 illustrate the construction of the front and alert to make any needed change of adiustend of the mamne ment. Thus the eiilciency oi the road work- Fig 4 s a front elevation 25 mi apparatus as a Whole is increased' Fig. 5 is a detail plan view of the tractor pole t is an object of the invention to provide steering mechanism' a part of the housing be 1alarciixid maciline aililavingf. ardij earth zvorkiing 1:3001i mg broken away vgawer geoausmenanwc Fig. 6 is a side elevation of the iront end of the {tgxglsltslggnfasuy and positively from the oper' machine, the draft connection to the tractor be- 30 Another object of the invention is to provide mg shown in section a road machine of improved construction and Fig 7 is 9 dem section taken on the -lme 1 1 having an earth working tool adapted to be in Fig' 8' f y positioned to make a high ang1e cut. Fig. 8 is a section disclosing the tractor pole Another object of the mventmn is to provide steering mechanism, taken on the line 8--8 in a road machine having a power control mecha- 'F 1g' 5 msm and a plurality of adjusting mechanisms Fig. 9 is a section on the line 9--9 in Fig. 2. operable thereby to position an earth working Fist 1015 illustrate the construtton of the toa] to make a mgh ang1e cufh rear end of the machine. w

Another object ofthe invention is to providey F18- 10 1S a 1 ear View taken 0n the une '0-'0 a road machine having an earth engaging tool 1n Fig 1- I adapted to be positioned to make a high-angle Fig. 11 (Sheet 3) is a section taken on the cut by adjusting mechanisms operated from a line ll-ll 1n F1910.

5 source of power. Fig. 12 (Sheet '7) is a -section taken on the line 5 Another object ci' the invention is to provide I2-I2 in Fig. 3. a road machine having power-operated means Fig. 13 is a section taken on the line I3--I3 in for adjusting an earth engaging tool from a ver'- Fig, 12, tical depending position to an elevated position Fig. 14 is a plan view taken on the line I4--I4 50 on either side of the machine. in Fig. 1. A 50 Fig. 16 is a vertical transverse section taken on the une ls-ls in Fig. 2 illustrating the blade lift,

and circle center shift.

Fig. 17 is a view taken on line II-I1 in Fig. 1.

Fig. 18 is a section taken on line |8-I8 Ain Fig. 17.

Fig. 19 is a detail of the locking pin for the circle.

Fig. 20 is a section taken on the line 20-20 in Fig. 17.

Fig. 21 is a view taken on the line 2 I-2I in Fig. 20.`

Fig. 22 is a section taken on the line 22-22 in Fig. 2l.

Fig. 23 is a View taken on the line 23-23 nzFg. 20 illustrating a portion of the adjusting means for shifting the circle on its center.

Figs. 24-26 illustrate the adjusting means for the center shift.

Fig. 24 is a section taken on the line 24-24 in Fig. 2.

Fig. 25 is a View taken on the line 25-25 in Fig. 24

Figs. 27-28 illustrate the power control mechanism.

Fig. 27 is a view taken on the line 21-21 in Fig. 1, certain portions of the control box being shown in section.

Fig. 28 is a view on the line 28-28 in Fig. 27.

Fig. 29 is a section on the line 29--29 in Fig. 27.

Fig. 30 is a view on the line 30-30 in Fig. 29.

Fig. 31 is va perspective view of the machine looking from above and toward the rear end.

Fig. 32 is a diagrammatic view illustrating a high angle position of the blade with the machine on sloping ground.

Fig. 33 is a diagrammatic view illustrating a high angle position of the blade with the machine on level ground.

DESCRIPTION or' MACHINE Frame (Sheets 1, 2, 3, 4, 7, and 15) The frame of the machine is substantially symmetrical with respect to the longitudinal axis, and includes two side channels I0, Il (Fig. 2), which extend substantially the length of the machine and have a slight convergence toward the front end. These side channels are interconnected by cross members and braces.

At the front end of the machine, plate I2 is riveted to the forward ends of side channels I0, |I. Angle I3 at the front edge of plate I2 is riveted to plate I2 and to side channels I0, II. Beneath plate I2 is bracket I4 (Fig. 4) having central horizontal portion l5 providedwth bosses I6 welded thereon, and having vertically extending portions I1, I8, which are riveted inside the forward ends of side channels I0, II, respectively. A framework comprising members I9, 20, 2|, 22, 23, 24, is secured to the front end of the frame as a support for a mechanism to adjust the line of draft of which only the parts mounted on the main frame are shown in the drawings.

At the rear end of the machine (Figs. 1 and 3), side channels I0, II are bent downwardly and rearwardly, and plate 25 is secured to their under sides. The upper edge of plate 25 is reinforced by angle 26. Pairs of angle extensions 21, 28 (Figs. 3 and 10) are secured to the ends of side channels, I, Il, respectively, by brackets 30, by plates 3|, 32, respectively, and by straps 33 (Fig. 3).

T-bar 30 has its ends overlapping straps 33, and."

is secured to the lower edge of plate 25. To the rear ends of extensions 21, 28 is secured angle 35..

Fig. 26 is a view taken on the line 26-26 in Fig'.`

Vertical posts 36, 31 (Figs. 10 and 14) are secured to the inner sides of side channels I0, II, respectively, and serve to lsupport a portion.' of the blade lifting mechanism. Channel 38 is secured to the lower ends of posts 36, 31, and in addition to reinforcing the framework serves in conjunction'with inverted U-bracket 39 (Figs. 3 and 14) to support platform 40. Rear vertical end 4| of engine bracket 42 (Fig. 3) is bolted to channel 38 and the horizontal part thereof extends forwardly through aperture 43 in plate 25 to which forward inclined end 44 thereof is bolted. The ends of U-bra'cket 39 (Figs. 14 and 15) are se` cured to plate 45, which together with plates 25. 46 and channel 41 serve as a tool box as well as reinforcing the framework. Plate 46 (Fig. 15)I is secured at its edges to inner angles 21, 28, respectively, and to plate 25 at its forward end. Channel 41 is supported on the rear edge of plate 46 and supports the rear edge of plate 45 which is suitably secured thereto. Angles 48, 49 (Figs. 14

and 15) are riveted to the edges of plate 45 and nections are reinforced by gussets 51, 58, and

angles 59, 60. Angles 55, 56 also serve to support part of the blade lifting mechanism. The ends o f a pair of spaced apart angles 6I 62 (Fig. 3) are secured to the bottom faces of'side channels |0, II beneath angles 55, 56; the central web of T-bar 63 is interposed between angles 6I, |52 and is secured thereto. Angles 6|, 62, and T-bar 83 support the center shift mechanism. The central portion of side channels I0, are further reinforced by angles 64, (Fig. 2) which are secured to the inner lower edges thereof and extend rearwardly to posts 36, 31, to which they are also secured.

Intermediate' the front end' and the central cross members (Fig. 2) is cross member 66 which is fabricated, having a substantially I-beam cross section and end flanges for securing it to side channels I0, I. The connections of cross member 66 with the side channels is reinforced by gussets 63, 10.

To obtain rigidity and to prevent weaving, diagonal braces 1|, 12, 13,` 14, 15, 16, are employed, as shown in Fig. 2. Cross piece 11 is connected to side channels I0, II, to provide a support for adjusti'ng mechanisms.

Front wheels and tractor pole (Sheets 2, 4, 5 and 6) (100 series numerals) Front wheels I00, |0I (Fig. 4) are journaled on spindles which are integral with bell cranks |02, I3, pivoted at |04, |05, in angles |06 (Fig. 6) which comprise the front axle. Upwardly converging channels |01, I08 (Fig. 4) are secured at their lower ends to angles I06 and at their upper ends to casting |09, having boss I||1 (Fig. 9) apertured at III and contacting the under side of boss I6 on horizontal portion I5 of frame bracket I4.

Hollow kingbolt II?? passes through aperture I I I and is supported in bosses It through which it passes, and at M3, I Iii in housing II5 which is provided with dang@ II@ for attachment to plate |2 of the main frame. Nut ||1 is threaded to the lower end of kingbolt ||2 and is adapted to be locked thereon by cap screw ||8. The front axle and wheels pivot on the vertical axis of the kingbolt.

The front wheels can be tilted with respect to the front axle by rocking bell cranks |02, |03 (Fig. 4) on their pivots |04, |05. For this purpose the upstanding arms I|3, |20 of bell cranks |02, |03 are pivotally connected to shift bar |2|. Movement of shift bar |2| will impart equiangular oscillations to the bell cranks. To facilitate operation of shift bar |2|, a strap |22 is pivotally connected to axle |06 and lug |23 secured to the shift bar.

To operate shift bar |2I, sector |24 (Figs. 4 and 6) is secured thereto and meshes with vpinion |25 (Fig. 6) on shaft |26 journaled in housing |21 and provided with worm gear |28 (Fig. 4) which is rotated by worm |23 on shaft |30, also journaled in housing |21. Housing |21 has a,v

portion which extends downwardly to fit between angles |06 to which it is secured by bolts. Means are provided for limiting tilting movement of the wheels, said means comprising fingers 124A formed on sector |24 at the ends thereof and adapted' to engage said pinion |25 to prevent further movement thereof. The tilting mechanism is operable to impart approximately 30 tilt of the wheels with respect to the frame.

The driving connection for the tilting mech- `anism includes shaft |3| (Fig. 9) which passes through hollow kingbolt ||2 and is operatively connected to worm |23 by an extensible driving connection comprising square shaft |32 telescopically engaging within hollow square sleeve |33. Sleeve |33 has a universal joint |34 with shaft |3|, and shaft |32 has a universal joint |35 with worm shaft |30. Rotation of shaft |3| effects rotation of worm |23, worm wheel |26, shaft |26, pinion |25, to shift bar 2| to tilt the wheels. The extensible universal connection between shaft |3|vand worm |23 enables the shift bar to be operated in all positions of the wheels and axle.

Shaft |3| (Fig. 9) has bevel gear |36 keyed to its upper end and retained thereon. Bevel gear |36 is journaled at |31 in housing |38 which fits the reduced upper end portion of kingbolt ||2 and is secured thereto by means of lock bolt |33. Bevel gear |36 is driven by bevel pinion |40 keyed to shaft |4| which is journaled at |42 in housing |38 and is provided with sleeve |43 received vin housing |38 at |44. Shaft |4|' is retained in place in housing |38 by means of nut |45 and fork |46, which is secured to shaft .|4|' and forms part of universal joint |41, the other fork |48 of which is secured to shaft |43. The rear end of shaft |43 is supported at |50 (Fig. 2) `in support 11', where it is connected by universal joint |5'| to telescopic shaft |52 which is supported on angles 55, 56 (Figs. 2 and 31) at |53 andis driven in a manner to be described hereinafter.

A steerabletractor pole is, provided as a draft connection from a tractor to the machine. Pole |55 (Fig. 6) is received at its rear end in cylindrical portion |56 of connection bracket |51 by bolts |58 and lock bolt |53. Bracket |51 is provided with vertical cylindrical portion |6| which receives drafty pin |62 (Fig. 9), the lower end of which passes through lfront angle |06 and is re- At its front end (Fig. 6) pole |55 has housing |66 welded thereto and collar |61 is welded to' housing |66. Guide |66 is held in collar |61 by bolts |63 (Fig. '1) which pass through apertures insaid collar and engage grooves |10 in said guide |66. Draft bolt |1| extends through central aperture in guide |68 into housing |66. Compression spring |12 surrounds said bolt |1| being held between guide |68 and washer |13 which engages nut |14 on bolt |1|. Apertured draft link |15 is pivoted to draft bolt |1|. In assembling the above described draft connection, guide |66, spring |12, washer |13 and nut |14 are placed on draft bolt |1| in the order named. This assembly is then placed within housing |66 and guide |68 is then positioned so that grooves |10 are aligned with the apertures in collar |61 when bolts |63 are inserted. It is to be noted that either of grooves |10 in guide |68 are adapted to cooperate with either of bolts |63, and that in both positions of said guide a lubricant passage provided therein coincides with the lubricant passage in collar |61.

A pole hanger is provided to relieve the bracket connection of the weight of the tractor pole. Strap |16 (Fig. 6) is pivotally secured at the upper end thereof to the top of braces 20, 22, which comprises a single piece, and is pivotally connected at its lower end to chain |11. Spring |18 is connected to chain |11 and to housing |13 which is bolted on pole |55 intermediate its ends.

The tractor pole is steerable so .that it can be set at an angle with respect to the front axle of the machine so that the machine can be vdrawn by a traction vehicle which moves along a path parallel to the path of the machine. ,Connections (Fig. 4) are riveted to front angle |06 adjacent opposite ends thereof and have adjustable rods |8| (Figs. 2 and 6) pivoted thereto. Sprocket chain |82 connects the front ends of rods |8|. Said chain |82 engages sprocket wheel |83 (Fig. 8) in housing |13, said sprocket wheel being integral with collar |84 journaled on shaft |85 mounted in said housing |18. vBy rotating sprocket wheel |83 the length of chain |82 on either side thereof is varied and the angle of the pole with respect to the front axle is varied.

Sprocket wheel |83 is actuated through worm wheel |86 on collar |84, by worm |81 (Figs. 5 and 8) keyed on shaft |88. Said shaft |88 is jour- ,naled in housing |13 and carries bevel gear |83 (Fig. 5) which meshes 'with bevel' pinion |30 on shaft' |3| journaled in cover |32 of said housing |13. Shaft |3| (Fig. 6) is connected by universal joint |33 to telescopic shaft |34 which has universal joint |35 with shaft |36 journaled in sleeve |31 welded'to brackets |38"on strap |16. Shaft |86 has universal connection |33 with telescopic shaft 630 which is driven by the power control mechanism in a manner to be described hereinafter.

Rear wheels (Sheets 2, 3, 7, and 8) (200 series numerals) their ends 2|| 2|2, 2|3, 2M, t0 brackets 206,'Ak

201 by welding to provideV continuous flanges along the bottom edges of vthe axle for cooperation with guides 2|5, 2 I6, 2 I1, 2 |8, on main frame extensions 21, 28. 

